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Physics (AS & A Level) · May / June 2017 · Paper 13 · Question 19

9702Elastic and plastic behaviour

Two springs X and Y stretch elastically. The graphs show the variation with extension x of the force F applied to each spring. Which statement is correct?

  1. AWhen each spring is given the same extension, the energy stored in Y is 4 times the energy stored in X.
  2. BWhen each spring is given the same extension, the energy stored in Y is 8 times the energy stored in X.
  3. CWhen the same force is applied to each spring, the energy stored in Y is 4 times the energy stored in X.
  4. DWhen the same force is applied to each spring, the energy stored in Y is 8 times the energy stored in X.

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Correct answer: B. When each spring is given the same extension, the energy stored in Y is 8 times the energy stored in X.

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